A multifunctional woodworking compass ruler is composed of a transverse ruler body (1) and a longitudinal ruler body (2). The transverse ruler body is provided with transverse straight ruler scale marks (3) and radius scale marks (5), and a neutral position (9) having the same length as the radius scale marks is reserved below the radius scale marks. The middle of the transverse ruler body is further provided with another neutral position, a circle drawing pen (6) can move in the neutral position, and a fixing screw (8) is used for fixing the circle drawing pen (6) to a needed position. The longitudinal ruler body is provided with vertical straight ruler scale marks (4). The transverse ruler body is further provided with a rotating crank (10). The ends of the transverse ruler body and the longitudinal ruler body are connected together, and a circle center pen (7) for drawing a circle is arranged at the ends of the transverse ruler body and the longitudinal ruler body. When not used, the longitudinal ruler body can be rotated to be stored below the transverse ruler body. When used, the longitudinal ruler body is lifted up to be perpendicular to the transverse ruler. The longitudinal ruler body is fixed with a screw (11). The multifunctional woodworking compass ruler has the positive effects of having multiple purposes, being capable of serving as a straight ruler, compasses and an esquadro, and being an ideal drawing tool for woodworkers.